Handle for ratio adjusters



Jan 9, 1923.

1,441,794. H. A. YGERMAIN.

HANDLE FOR RATIO ADJUSTERS. FILED 050.9.1921.

InVenUarI ihz-zrm A.Gev-m qin by mhmw Hi5. Attor'ngy llhatented darn it; 1

HlEiNI'Etll' it. GERETATN, 01E PITTSFIELD, Milfifil-TUI'TUSJETTS, AfiSlEGN 013; T0 GENERAL GQMPAINY, it. UUBLPUEPLATTUN 01E Ill'lEl'iliT YORK.

HANDLE F0 12 lEt-Al'liilfi ADE'J'USTEHEK.

application filed December 9, 1921.. Serial 1W0. 521,211.

.9. n all whom it may gouge m:

it known that l, li'liENRY it. brnnivinrrn a sub ect oiithe BlltlSll Empire, residing lidittsilield, in the county oi Berkshire, i itate oi ll/lassacl'iusetts, have invented. certain new reflective turns in one of the windings so as to adjust the voltage or current ratio be tween this and some other winding or windings. Tn connection with encased induction apparatus such as oiliminersed transformers, it has been found convenient and eco nonlical to provide such ratio adjusting means in the form of a tap changing switch immersed with the apparatus in the same casing".

lit isthe generalobject of the pr sent in vention to provide an improved form of handle for operating an enclosed. tap ch angrinp; switch, the handle being; located so as to be easily accessible and operable from outside the casing so as to avoid the nece sity of opening the casing}; to make desii changes in the adjustment of the switch Tt is a further object oi the invention to provide an arrangement of parts such that the switch ma be adjusted without danger of leakage from within the casing; of any cooling medium in which the switch may be immersed.

Tn the accompanying; drawing, 'L is a sectional view of a switch adjusting handle constructed in accordance with the prezterred embodiment of the invention and Fig. 2 is a view of a handle constructed in accordance with one modification of the in vention.

Tn the form 015 handle shown a base 1 is threaded tightly into c 2 which surrounds the ratio adjustinr:

switch. This switch and the induction ap pressure against its end mav serve to rotate the shaft in either direction The lower end of the shaft is of course operably connected with the switch so that the rotation oi the shaft may effect any de sired adjustment oi. the switch. A thimble 4t has bearing contact withthe upper or outer end of the shaft sothat the two are relatively rotatable. A flexible sleeve or tube 5, preferably 01 transversely corrugated thin metal surrounds the shaft 3 be tween the base 1 and the thimble l and the two ends of this sleeve are joined permanently, as by soldered connections 6 and F, to the base 1 and thimble lrespectively; these connections forming joints which are impervious to the oil or other cooling fluid within the casing 2. The base 1, sleeveo and thimble 4 thus form a tubular sealed enclosure surrounding the outer end of the shaft 3 so as to prevent all times any escape or leakage of cooling fluid through the switch adjusting); handle. in order to provide additional support and rigidity to the structure a bracket is shown, this bracket being composed preferably of two rigidly connected arms 8 and 9 to facilitate assembly. llne end o'tthe arm 8 ot the bracket rotatably surrounds the base 1, be ing held loosely in place by a nut 10 and washer 11. The other end of the bracket is rotatable upon the outer end of the thimble 4 and is formed with a knob or grip for convenience in operating the handle. A pointer or indicator 13 may be attached to the lower part of the bracket to indicate the switch adjustments.

Tn operating or adjusting the switcln a side pressure upon the grip 12 rotates the bracket about the axis of the main or lower portion of the shaft 3. The bracket carries the thirnble 4L and the upper or curved end of the shaft with it about this axis so as to rotate the shaft. The flexible tube or sleeve 5, however, being rigidly attached at its lower end to the base 1, cannot rotate about its own axis but merely flexes to accommodate itself to the direction of the curved portion of the shait this being permitted by relative rotation between the thimble 4L- and its bearing in the upper end of the arm 9 of the bracket.

A. modified :torm oi the invention is shown in Fig. 2 of the drawing. As shown here, the casing 20 supports a frame 21 which provides a bearing for the upper end of the shaft 22. This shaft extends downwardly to the switch to which it is operably connected, the switch not being shown, however, as it forms no part of this invention. A crank arm 23 is rigidly secured to the upper end of the shaft 22. A short shaft or handle 24 extends through an opening in the cas ing 20 in line with the shaft 22 the lower portion of this handle being curved to one side and its lower end fitted into a bearing in a thiinble 25 which is in turn rotatable in a bearing in the outer end of the crank arm 23. A flexible sleeve or tube 26 surrounds the lower curved portion of the handle 24- and its two ends are permanently sealed, as by soldered connections into the thimble 25 and a sleeve 27, the sleeve 27 being secured in any suitable manner to the casing 20. When the handle 24; is turned, its lower end with the thimble 25 moves the crank arm 23 and thus the shaft 22 is turned to give the switch any desired adjustment. The flexible sleeve or tube 26, being rigidly fixed at its upper end to the casing 20, cannot turn about its own axis but merely flexes to adjust itself to the direction of the curved portion of the handle 24:, its function corresponding to that of the flexible tube 5 of Fig. 1 and being to form a complete seal to prevent leakage of fluid through the handle from within the casing.

vVhat I claim as new and desire to secure by Letters Patent of the United States, is,

1. A switch adjusting handle including a. curved shaft rotatable about the axis of one end thereof, and a seal enclosing the other end thereof.

2; A switch adjusting handle including a curved shaft rotatable about the axis of one end thereof, and a flexible tubular seal enclosing the other end thereof, said seal being secured against rotation about its own axis.

3. A switch adjusting handle including :1 fixed base formed with a bearing, a shaft rotatable in said bearing and having an end portion curved to one side beyond said bearing and a flexible tubular seal enclosing the curved end of the shaft and sealed to said base to prevent rotation about its own axis.

l. A switch adjusting handle including a base formed with a bearing, a shaft rotatable in said bearing and having an end portion curved to one side beyond said beau ing, a thimble rotatable upon the end of the shaft, and a flexible sleeve surrounding the shaft between. said base and thimble.

5. A switch adjusting handle including; :1 base formed with a bearing, a shaft rotatable in said bearing and having an end portion curved to one side beyond said heuring, a thimble rotatable upon the end of the shaft, and a flexible sleeve surrounding the shaft and with its ends sealed into said base and thiinble.

6. A switch adjusting handle includin; a base formed with a bearing, a shaft rotatable in said bearing and having an end portion curved to one side beyond said bear ing a thimble rotatable upon the end of the shaft, a flexible sleeve surrounding the shaft between said base and thimblc, and a support with its opposite ends rotatably connected to said base and thiinble.

T. A switch adjusting handle including :1 base formed with a bearing, a shaft rotatable in said bearing and having an end portion curved to one side beyond said bearing, and a flexible sleeve surrounding and extending along the curved portion of the shaft and with one end sealed to said base.

In witness whereof, I have hereunto set my hand this (3th day of Dec, 1921.

HENRY A. GERMA'I'N. 

